Carbonated beverage dispensing device



Jan. 16, 1951 N, L, L usTER 2,538,1 l1

CARBONATED BEVERAGE DISPENSING DEVICE INVENTOR ,/VofnYa/IQL. L11/fr ATTORNEY N. L. LUSTER CARBONATED BEVERAGE DISPENSING DEVICE Jan. 16, 1951 3 Sheets-Sheet 2 Filed Oct. 23, 1945 n2 JJ 0 7 au mi au 9 6 Il w n, u mw 9 7 l fila u. R :wann 5 ....4 l, 00 j. 2 m. M M J qw y ff INVENTOR Norman L. Lus/ier ATTORNEY Jan. 16, 1951 N. l.. I UsTER CARBONATED BEVERAGE DISPENSING DEVICE 3 Sheets-Sheet 3 Filed 0G13. 23, 1945 ATTORNEY Patented Jan. 16, 1951 OFFICE CARBONATED BEVERAGE DISPENSING DEVICE Norman L.. Luster, Chicago, Ill.

Application October 23, 1945, Serial No. 624,066

This invention relates to improvements in iiuid metering devices, and more particularly relates to metering devices for measuring and delivering portions of one fluid to be added to another fluid.

A principal object of my invention is to provide a novel and improved form of fluid metering device for measuring portions of one liquid and delivering said portions` into contact with another liquid.

Another object of my invention is to provide an improved device for measuring and delivering portions of flavor-'ing syrup and mixing said syrup with carbonated or plain Water.

A more specic object ofmy invention is to provide an improved apparatus for dispensing beverages by utilizing the energy of the carbonated water being delivered to operateV a syrup pump which adds measured portions of Syrup to said carbonated water as it is delivered.

A further object of my invention is to provide an improved beverage dispensing device for dispensing mixed beverages, which may be attached to existing carbonated Water faucets with only a slight modification of the faucets.

Apparatus for dispensing mixed beverages require that means be provided for measuring portions of the flavoring syrup to be mixed with the Water, and that other means be provided for bringing the syrup and water togetherl to form the mixed beverage. Such beverage dispensing devices have heretofore depended upon gravity feed of the flavoring syrup from a vessel mounted above the dispensing faucet, as well as pressure feed of the flavoring syrup from a vessel in-Which a gas pressure is maintained above the syrup. Still other types of dispensers make use of the injector, or aspirator principle, aspirating the syrup into a jet of water.

Dispensers depending upon gravity feed of the. syrup from a vessel mounted above the dispensing faucet` require a separate cooling means when used in soda fountains,` or else the syrup is delivered warm with the result that foaming is excessive when the syrup mixes with the carbonated Water.

Dispensers depending upon pressure feed of the syrup from a vessel in which a gas pressure is maintained have certain disadvantages, in that the vessel containing the syrup must be heavy enough to withstand thegas pressure, and the lid. and fittings to the syrup storage vessel must be pressure-tight. Where the vessel is` pressuretight and the storage vessel has been emptied of syrup, the gas which has been used to displace 8 Claims. (C1. 22S-21) the syrup is wasted when the cover of the storage so vessel is unfastened to refill the vessel with syrup and service is interrupted while the syrup Vessel is being refilled.

Dispensers which utilize the aspirator principle to bring the syrup into contact with the Water may inject the syrup into the uncarbonated water before it flows into the carbonator, or may inject the syrup into the carbonated water as itiiows from the carbonator to the delivery faucet. Injecting the syrup into the carbonator has certain disadvantages, however, in` that the carbonator can only be used for one type of beverage, .and excessive foaming results when the mixed beverage is delivered` from the carbonator under relatively high pressure into the delivery faucet at atmospheric pressure.

In carrying out my invention, I remedy the Idisadvantages of the foregoing types of beverage dispensingY devices by providing a syrup pump for` pumping avoring syrup from a storage vessel into a water delivery faucet, and .by driving the syrup pump by apressure responsive device actuated by the pressure of the carbonated water used. In one form of my invention, I subject the pressure responsive device to pressure when the delivery faucet is opened, and relieve pressure from` the pressure respons-ive device when the faucet is turned off. I also operate the pressure responsive device at a relatively high pressure, with a relatively small displacement, so that the carbonated water discharged after the faucet is closed will be relatively small.

While the present invention is illustrated and described in connection with apparatus for dispensing beverages, it will be understood by those skilled in this art that changes may be made to adapt the invention for use in any apparatus where it is desired to utilize the energy of a fluid under pressure to measure and deliver portions of another fluid.

These and` other objects of my invention will appear from time to time as the following specication proceeds and with reference to the accompanying drawings wherein:

Figure 1 is a view in vertical section of a beverage dispensing device constructed in accordance with one form of my invention;

Figure 2 is aview in partial vertical sectionof a modified form of beverage dispensing device constructed in accordance with my invention, showing` the device-connected with a conventional delivery faucet;

Figure 3 is a view in partial vertical section showing another modified form of beverage dispensing device constructed in accordance with my invention, and showing the syrup pump outside of the syrup container and actuated directly by the water under pressure; and

Figure 4 is a view somewhat similar to Figure 3, but showing a piston in place of the diaphragm pump shown in Figure 3.

Referring now in particular to Figure 1 of the drawings, the beverage dispenser illustrated therein includes a syrup pump l I, a syrup storage vessel I2, a syrup pump actuating device I3, and a faucet I4 mounted on a draft arm I5.

The syrup pump II includes a piston I6 movable within a cylinder Il and having a piston rod i8 extending from said piston through a top cover plate is for said cylinder. A bottom plate 22 having a central opening 2| therein is secured to the bottom of said cylinder, and with a check valve 22 closes the bottom of said cylinder when said piston makes its down stroke.

rIhe check valve 22 consists of a circular disk 23 adapted to close the central opening 2|. Said disk is confined in position over said opening by means of a plurality of spaced retaining members 24, 24, secured to the top of the plate 2B and having portions spaced upwardly from and extending inwardly over the top of said disk. On the upward stroke of the piston I6, said disk will be lifted from said opening through said bottom plate to permit said piston to draw syrup within said pump chamber in an obvious manner.

`The pump II is herein shown as being suspended from a top 25 of the storage tank I2 on a plurality of rods 26, 2e secured to the top closure plate I9 at their lower ends and secured to the top of said storage tank at their upper ends.

An elbow 2l is connected with and communi- Cates with a wall of the cylinder I'I adjacent the lower end thereof, and has a fitting 29 connected to its upper end, which has a check valve 3Q therein. Said check valve is herein shown as being a well known form of ball check valve, but may be of any other form desired. A pipe 3| extending through the top of the tank I2 and through the draft arm I connects said check valve with the faucet I4, to supply syrup thereto from the pump II.

The top I9 of the syrup pump is provided with a plurality of openings 32, 32 therein, to allow syrup leaking `by the piston I6 and piston rod I8 to flow out of and into said cylinder on the upper side of said piston, as said piston moves up and down within said cylinder.

A spring 33 encircles the lower portion of the piston rod I8 and is interposed between the top l5 of the cylinder il and a collar 34, which abuts and is held from upward movement along said rod by means of a shouldered portion thereof. Said spring serves to return the piston I6 to its upper position within the cylinder I'I. The upper portion of said piston rod is threaded and has a flanged sleeve 35 threaded thereon, which serves as an adjusting nut to limit downward movement of said piston rod and said piston within said cylinder. Said adjusting nut slides freely in the top 25 of the syrup storage tank l2. A fitting 36 is threaded on the upper end of said piston rod and has a slotted upper` end which is open at its top, to receive an actuating lever 3'I. A pin 38 passes through the slotted portion of said fitting in a direction transverse to said lever and ts in an open slotted end of said lever, as shown.

The syrup pump actuating device I3 includes a cylindrical housing 39 having a closed bottom except for a tting 4i), arranged to permit fluid underpressure to pass therein. The upper endof said housing is flanged and is closed by a circular plate 4i abutting the bottom of a projecting portion of the cover 25 of the syrup storage tank. A suitable packing ring or gasket is interposed between the top of the flanged portion of said housing and the underside of said plate. Said housing and plate are secured to the bottom of said projecting portion of said cover by means of machine screws and nuts 42, 42.

A bellows 43 is contained within the housing 39, The lower end of said bellows is closed by a circular plate 44, which may be brazed or soldered thereto. The upper end of said bellows is secured to and depends from an annular depending lug 45 formed integrally with the plate I. A rod 46 is rigidly attached to said plate 44 and extends upwardly therefrom and is extensible from said housing through the top of the projecting portion of the cover 25 of the tank i2. The upper end of rod 45 has a fitting 4'? threaded thereon, the upper end of which is slotted to receive the opposite end of the lever 3l from the fitting 3S. A pin 48 extending through the slotted portion of said tting serves to connect said lever to said fitting. A pin 48 mounted in a support 5S extending upwardly from the cover 25 for the syrup storage tank, serves as a fulcrum for said lever 3i. Downward travel of said rod L36 is limited by the fitting 4i' engaging the top of the cover 25.

Thus when carbonated water enters the housing 39 under pressure, the bellows '43 will be cornpressed and the rod 46 will move upwardly, to move the piston I6 downwardly within the cylinder I'I, through the lever 3l, and pump syrup past the check valve 32 and through the pipe BI to the faucet I4.

The delivery faucet I 4 is mounted on the draft arm I5 by means of shouldered connecting nuts 5I, 5I, threaded on vertically spaced pipe fittings 52, 52 extending outwardly from said draft arm. Said nuts have inwardly extending flanged portions engaging the flanges of fluid conduits 63, 53, suitably secured to said faucet and communicating therewith. Said draft arm may be of any well known form and is no part of my present invention so is not herein shown or described in detail.

The delivery faucet I4' is herein shown as comprising a cylindrical body 5I closed by a top cover 62 and having a delivery spout 63 depending from the lower end thereof. A valve 64 is provided to admit carbonated water under pressure, supplied through a pipe 65 connected with the central tting 5I and conduit 53, to a chamber 66 of said faucet, herein shown as extending in the direction of the longitudinal axis of said body. A disk 6'I is suitably secured to the upper end of said chamber and has a central orifice G9 leading from from said chamber to the underside of a disk 1U mounted on the lower end of a rod I. Said rod is slidably mounted in a guide member 'I2 mounted in the topV cover 62. A spring 'E3 encircles the upper portion of said rod and is interposed between the top of said guide member and a spring retaining member 'I4 threaded on the upper end of said rod, so said spring will yieldably hold said disk in spaced apart relation with respect to the disk 6l'.

A plate I5 is mounted within the cylindrical body 6I and is secured to the bottom of the chamber 66 by means of a machine screw 16. Said plate is apertured to permit carbonated water to pass from said body and mix with syrup passing through the pipe 3|` and entering said body beneath said plate throughthe lower fitting 52.

rlhe valve 51| is operatedby means of a valve rod il extending through the walls of said chamber and through the body A head'l is provided on the outer end of said valve rod. A spring 80 encircles said rod and is interposed between the outside of said body and said head to urge said valve into a closed position. An operating lever el is pivotedto a supportmember 83 intermediate its ends. Said` support member extends outwardly from the outer wall: of! the body 6l and may be securedthereto as by welding. The lower end of said` operating lever is adapted to engage` the head 'i9 on the end of' said valve rod, upon movement of the hand grip of said handle away from said body, to move said valve rod against the spring te and` open said valve.

When the valve 64, is opened by operation of the lever 8|, carbonated water will pass into the chamber et and out said chamber, through the conduit 53, fitting 52, and a pipe 55` extending through the draft arm l` and connected with the fitting lli?. From thence it.` iiows to the inside of the housing 3e to compress` the bellows 43 and operate the syrup pump in the hereinbefore described manner. Carbonated water will also pass through orifice 69 and flow between the disks 5l and lil in a thin circular sheet and out through the apertured plate l where it is mixed with the syrup supplied through` the pipe 3|, and is discharged with the syrup through the spout 63.

As the pressure in the chamber 56 increases, the velocity of the thin film of carbonated water.` Will increase with a resultant lowering of pressure between said disks, causing the disk 'l0 to be forced closer to the disk 6l against the` spring 13 by atmospheric pressure on the top of said disk it. Thus an increase in pressurewill` tend to oonstrict the opening between said disks and thereby maintain the rate of ow of the` carbonated watei1 relatively constant. The diameter of the disks 6i and l0, the weight of the disk 10, the size of the orifice 59, and the strength ofthe spring i3 may be varied to provide the desired `rate of iiow of the carbonated water. The carbonated water will thus be delivered from a region of high pressure to one of atmospheric pressure in the form of a thin film moving with low velocity. This favors the retention of carbon dioxide gasin solution.

When the valve o4 is closed, the disk 'l0 will be held above the disk 57 by the spring 13, allowing carbonated water displaced by the expanding bellows i3 to freely flow from the bellows housing 39 through the conduit 55 into the chamber 56, and out of said chamber through the orice 69. This flow of water between the disks 51 and 'l0 tends to remove any foreign particles or sediment which may have become lodged therebetween.

The modified form of beverage dispenser shown in Figure 2 is adapted to be applied to a well known form of faucet el of a type commonly used in soda fountains. A spout 92 is attached to an adapter 33 threaded on` the lower end of said faucet and depends therefrom. A syrup conduit 35, leading from a pump 95 suspended in a syrup storage tank al on supporting rods 08, 98is connected with and extends within said spout to sup,- ply syrup thereto as fluid, such as carbonated water, is discharged therefrom. A spring 99 encircling a piston rod it@ of said pumpis provided to move a piston |53! of said pump downwardly, while an actuator |02 is provided to move said' piston upwardly through a lever |03. Said` actuator. is` connected'` to said lever on. the same side of` a fulcrum ||04 for said lever assaid lever iszconnected: to saidpiston rod, so that contraction of bellows |05 of said actuator effected by the fluid under pressure` entering said actuator, will lift the` piston |0| insteadof depress it, as in Figure 1. SaidA pump and actuator are otherwise the same as sho-wn in Figure l, so need not herein be described further.

A valve H36 is provided to supply carbonated water under pressure to the actuator |02 and to the' faucet 9|. Saidxvalve comprises a` cylindrical body "l8r` closed` at its lower.` end and having a flanged top` closedby a cover plate |09. A gasket is interposed` between said flange and cover to prevent leakage. A fitting ||0 is secured to the bottom of' said body of said valve to admit fluid underpressure, such as` carbonated water, thereto, through an orifice A disk ||2 is mounted withinisaid body` just above said orifice and has a guide rod Il@ guided' within said cover and extending upwardly therefrom. An integrally formed upwardly extending cylindrical wall portion H4 of` said cover encircles' said rod. A spring H5' is` interposed between the. top` of said cover and a head iii of said rod, to hold said disk in spaced apart relation with respect to the bottom of saidlbody. A cap piece threaded onsaid cylindrical wall portionserves to cover said guide rod and spring. A pipe I8 leads from said cover and extends through the draft arm supporting: the faucet 9i, to supply carbonated` water to said faucet. A pipe |I0 leadsfrom said cover and is connected with a fitting |20 connected with the bottom of the actuator |02, for supplying carbonated water to said actuator, to contract the bellows |05 of said actuator and move the piston |0| upwardly against the spring` 99, to draw syrup into said pump.

it should here be noted that the inside of the bottom of the body |08 is finished in the form of a disk conforming to said disk ||2 so that the same constant flow characteristics will be attained when fluid passes through the orifice between the disk ||2 and inside of the bottom.` of said body aswhen passing through the orifice 690i the disk 6l shown in Figure 1.

When` the delivery faucet 9| is; opened, the pressure on the inside of the actuator |il2 will be relieved to an extent suiicient` to allow carbonated` wateri to discharge from said actuator through pipe H9` and through the chamber of valve |06 where it will join the carbonated water flowing into said chamber through the orifice and past thedisk H2. It also` flows through the pipe ||8 to said delivery faucet. At this time the bellows |05 will expand by the action of spring 99 on the" piston rod |00. As the piston rod itil and piston 0| are moved downwardly by said spring 99; syrup will be forced through the conduit into the delivery spout 92, and will flow out of said spout with the carbonated water in the manner described in connection with the embodiment of` my invention shown in Figure 1.

When the faucet 9| is closed, carbonated water will iiow through orice I, through the constriction` beneath the disk H2, through conduit HB, and into the actuator |02, to compress the bellows |05 and cause lever |03 to lift the piston |01 and draw syrup into the syrup pump.

In themodifled form of my invention shown in Figure 3, a faucet |3| is shown as being mounted on a draft arm |32. Said faucet is similar in construction toA the` faucet M shown in Figure 1 and is mounted on said draft arm in the same manner the faucet |4 is mounted on the draft arm l5, so said faucet and its mounting on said draft arm need not herein be shown or described in detail.

A syrup pump |35 is herein shown as being located outside of a storage tank |36 for the syrup and as being connected thereto by means of a pipe |31 extending into said tank near the bottom thereof. Said pipe communicates with a check valve |39, which is connected with said pump on the suction side thereby by means of a T-tting |49, connected with a closure member |4| for the upper end of said pump and com municating therewith through a passageway |42. A check valve |43 is connected with said T on the pressude side of said pump. A pipe |44 connects said last mentioned check valve with a conduit |45, communicating with the lower end of said faucet |3|, for supplying syrup thereto, to be mixed with carbonated water entering said faucet through a pipe |46 and conduit |41.

The pump |35 includes a bellows |49 enclosed in a housing |59. The upper end of said bellows is secured to a flanged ring and depends therefrom. The fianged portion of said ring rests on an upper flanged portion of said housing and the upper end thereof is abutted by the closure member |i| communicating with the T |40. Suitable gaskets are interposed between the flanged portion of said ring and the flanged portion of said housing and said cover. Machine screws and nuts |52 are provided to secure said coverl and ring to said housing.

A plate |53 having a depending cup-shaped or cylindrical center portion |54 has a rod |55 secured to and depending therefrom. Said rod is guided in a cylindrical member |56 secured to and depending from the bottom of said housing. A spring |51 encircles said rod and is interposed between the bottom of said cylindrical member |5 and a nut |59 on the end of said rod, to urge said bellows into an extended position. A cylindrical housing |69 is threaded in the lower end of said cylindrical member and encloses said spring and rod. An adjusting screw |6l, threaded in the lower end of said cylindrical housing and held in position by a lock nut |62, is provided to limit downward movement of said rod and beliows.

The cup-shaped portion |54 is internally threaded and has a flanged cylindrical member |63 threaded therein. The top of said cylindrical member is closed and has a rod |64 slidably mounted therein, and retained therein by means of a nut |65 threaded on the lower end thereof.

A valve |66, herein shown as being of a conical form and adapted to be seated in the passageway |42, extends from the upper end of said rod. A spring |61, interposed between the top of said cylindrical member |63 and said valve, is provided to hold said valve and rod in an extended position. Said valve is adapted to close the passageway |42 when the bellows |49 is at the end of its compression stroke.

A pipe |19 connects the inside of the housing |59 with a conduit |1| connected with the valve |3|, for supplying uid under pressure, such as carbonated water, to the inside of said housing to compress the bellows |49, when said Valve |3| is open, in the same manner as has been described before in connection with Figure 1.

When the valve |3| is open, the bellows |49 will be contracted by fluid under pressure entering the housing |59 through the pipe |10. If said bellows has been previously filled with syrup,

the syrup inside of said bellows will be forced out through check valve |43, pipe |44 and conduit into the delivery spout, and will flow out of said spout with the carbonated water, the check valve |39 being closed by the pressure of the syrup exerted thereagainst.

The compression of bellows |49 continues until valve |66 reaches its seat in the end of the passageway |42, and prevents further passage of syrup out of the bellows. When this occurs, the syrup inside the bellows assumes a pressure nearly equal to the pressure exerted by the carbonated water on the outside of the bellows, since the syrup is a virtually incompressible liquid.

Thus it is apparent that if the syrup pump is arranged so that any air which may be drawn into the bellows, is expelled at the beginning of the compression stroke, then a relatively thinwalled, flexible bellows may be used, since it is never subjected to more than a small part of the pressure of the carbonated water.

In the event that the valve |66 does not seat perfectly and permits a slight leakage of syrup into the passageway |42, the bellows 49 will continue to contract slowly and compress the spring |61 until the faucet |3| is turned off. This additional contraction of the bellows is limited by the fact that the rate of flow of syrup into the delivery faucet is adjusted by choosing a suitable size for the orifice in syrup conduit |45, so that the syrup normally stops flowing just before faucet |3| is turned off. Thus the bellows continues to contract slowly after valve |66 reaches its seat for a short time only, in the case where a perfect` seal is not formed. If valve |66 were rigidly attached to the bellows end plate |53, then the bellows would have to withstand the full pressure of the carbonated water when said valve rested on its seat without forming a perfect seal. This follows from the fact that even a slight leak of syrup out of the bellows would relieve the internal pressure if the bellows were held in a fixed position.

When the faucet |3| is turned olf, pressure in the pipe |1| will be relieved and the bellows |49 will be expanded by the spring |51, forcing carbonated water out of housing |59 through pipe |19 and out through the delivery spout of said faucet. This water will be equal in volume to the volume of the syrup just delivered. When the carbonated water ows into the bellows housing |59, its pressure is not appreciably reduced, and therefore it loses little gas from solution. When it flows out of said housing after the faucet |3| is turned olf, its flow is caused by the relatively low pressure imparted to it by the action of spring |51 on the bellows |49, and the water therefore is discharged through the faucet with a minimum of agitation, which is the condition favoring retention of gas in solution when the pressure is reduced. YThe rate at which this carbonated water is discharged through the faucet after the faucet has been turned olf, may be made to coincide approximately with the rate at which the foam on the mixed beverage subsides, so that the glass is automatically filled if the faucet is turned off when the foam is near the top of the glass.

As the bellows |49 expands, check valve |43 will close and check valve |39 will open, thus causing said bellows to draw syrup from the tank |36` through pipe |31 and check valve |39 into said bellows, to complete the cycle.

In Figure 4 of the drawings a piston pump has been substituted in place of the diaphragm pump shown in Figure 3. The faucet and the fluid connections thereto are the `sameas shown in Figure 3 so the same part numbers will be applied where the parts are the same as in Figure .'3.

The syrup pump is herein shown `as including a piston |13 movable within a-cylinder |14.` A piston rod |15 extends from the upper end of said piston through an 4enlarged `opening .|18 in a closure member |16 for the piston rod end of `said cylinder. A retaining nut |11 is threaded on the upper end vof said piston rod. Said `piston rod is enclosed by a housing member |19, which is threaded in a cylindrical boss |89 extending upwardly from said closure member. A spring f|8| encircles said piston rod and is interposed between said closure member |16 and said nut |11, to urge said'piston |13 towards the upperendiof its cylinder. An adjusting `screw |82 is threaded inthe head end of the cylinder |19 and is adapted to be engaged by said nut |11 to limit `upward movement thereof.

A fitting |33 is secured to and enters the housing member |19 near its upper end and is connected with the upper conduit |1| of the faucet |3| through a pipe |84, for .supplying fluid under pressure, such as carbonated water, to said `hcusing member and the cylinder |14 and piston |13, past the nut |17 and through the enlarged opening |18, when the faucet "|31 is turned to :an on position.

The head end of the vcylinder |14 is closed by a closure member |85, herein shown as having a fitting |85 suitably mounted in the central portion thereof and communicating with the 4inside of said cylinder. A Tl' |81 `connects :said fitting with a check valve |88 on the `suction sidetof `said pump. Said check valve is connected 'with a syrup storage tank |89 -`by means of a `pipe |190. Said T also connects said fitting with 4a check valve |91 on the pressure side of `said pump, which is connected with the lower conduit "|45 leading to the faucet |3|, by means of a pipe |92, for supplying a measured amount of syrup to said faucet.

Assuming the cylinder |14 to be lled with syrup, when the faucet 3| is opened, `fluid under pressure, such as carbonated water, will be ysupplied to the piston rod end of the `cylinder |14 through the passageway |18, to move the piston |13 downwardly along said cylinder. This `will close the check valve |88 and open check valve I9! and supply a measured quantity of Vsyrup to the faucet which mixes with the =car bonated water as it comes out of said faucet in the manner described in connection with Figures 1 and 3.

While I have herein shown and described a number of forms in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiments illustrated, excepting as they may be limited in the appended claims.

I claim as my invention:

1. In a beverage dispensing device, a pump, a pressure responsive device, an operative connection from said pressure responsive device to said pump, to actuate said pump, a syrup storage tank, a huid connection from said syrup storage tank to said pump, a valve including a dispensing faucet having a chamber, a fluid connection to said valve to supply carbonated water under pressure thereto, means selectively operable to open vsaid valve `to Asupply carbonated water to said chamber, a fluid connection'from `said chamber to 'said pressure respons-ive l device to supply `carbonated waterunder pressure thereto, to actuate said pressure responsive device and `operate said pump to deliver a measured quantity of syrup, a fluid connection from said pump `to said faucet, to deliver -syrup thereto, and aconnection from said chamber to said faucet to deliver carbonated water thereto to with the syrup delivered by said pump including an orifice leading from vsaid chamber and a valve disk moved towards said orice upon increase in pressure in said chamber and providing ka constant new control valve from said chamber.

v2. In a beverage dispensing device, a pump, `a pressure `responsive device, an operative connectionfrom said pressure responsive device to actuate said pump on 'its suction stroke, yieldable means for actuating Asaid pump on its pressure stroke upon the release of pressure from said :pressure `responsive device, a syrup storage tank, aflud connection from said `syrup 'storage tank to said pump, `a constant delivery valve, `a :duid connection to said valve to supply carbonated water thereto, a connection from said `valve to said pressure responsive device to supply carbonated water under pressure thereto upon opening 'of said valve, to actuate said pressure responsive device and `actuate ,said pump on `its suction stroke, a fluid connection leading from said pump for delivering a measured amount of syrup, and another fluid connection from said valve for supplying carbonatedwater to be mixed with `said syrup including a faucet selectively operable to release carbonated water from said valve.

3. lIn ,a beverage dispensing device, a pump, a pressure responsive device, an operative connection from .said pressure responsive .device to actuate said pump on its suction stroke, yieldable means for actuating .said lpump on `its pressure stroke upon the release of pressure from said pressure responsive device, a syrup storage tank, a fluid connection from said syrup storage tank to `said pump, `a dispensing `faucet having a valve .contained therein yfor controlling the flow of carbonated water, Aa fluid connection to said valve to supply `carbonated water thereto, ya connection from `said valve to said pressure responsive device to ,supply carbonated water under pressure thereto upon opening of said valve, to actuate said pressure responsive device and actuate said pump on its suction stroke, a nuid connection from said pump to said faucet for delivering a measured amount of syrup thereto, and another fluid connection from said valve to sai-d faucet for supplying carbonated water thereto, to be mixed with said syrup including an orifice and a valve disk normally urged away from said orifice and moving towards said orifice to restrict the flow of fluid therefrom upon the increase in pressure of fluid passing through said orifice.

4. In a fluid pump, a housing, a flexible bellows mounted within said housing, yieldable means for expanding said bellows, a uid passageway leading into an end of said housing and the inside of said bellows through one end thereof for supplying uid to said bellows upon expansion thereof by said yieldable means, another fluid passageway leading into said housing for admitting fluid under pressure thereto to the outside of said bellows to contract said bellows and cause said bellows to expel fluid therefrom, and means for 11 measuring the volume of fluid pumped by said bellows including a valve mounted within said bellows for engagement with said passageway leading to the inside of said bellows, upon predetermined contraction of said bellows.

5. In a iiuid pump, a housing, a flexible bellows mounted within said housing, yieldable means for expanding said bellows, a iiuid passageway leading into an end of said housing and the inside of said bellows through one end thereof for supplying fluid to said bellows upon expansion thereof by said yieldable means, and another iiuid passageway for admitting fluid under pressure thereto to the outside of said bellows to contract said bellows and cause said bellows to expel fluid therefrom, and means for measuring the volume of fluid pumped by said bellows including a Valve mounted within said bellows in the end thereof opposite from said passageway leading into said bellows, for engagement with said passageway upon -contraction of said bellows a predetermined amount, and yieldable means for holding said valve in an extended position and adapted to yield upon engagement of said valve with said passage- Way.

6. A faucet for dispensing beverages or the like including a casing, a valve chamber within said casing and having a wall with an outer flat surface, an inlet port leading into said chamber, an outlet orifice leading through said wall, a valve for controlling the passage of fluid from said inlet port through said outlet orifice, a member mounted in juxtaposition to said fiat outer surface of said wall and with said wall forming a passageway for fluid passing through said oriiice, for movement towards and from said nat outer surface of said wall, to constrict or enlarge said passageway, and yieldable means for urging said member to move in a direction away from said wall, and iiuid under pressure passing through said orifice causing said member to move towards said wall against said yieldable means by the difference in pressure of fluid passing between said member and wall and atmospheric pressure on the outside of said member as the velocity of fluid passing through said orifice increases and reduces pressure between said wall and said member below pressure on the outside of said member, causing pressure on the outside of said member to move said member towards said wall, to maintain a relatively constant flow of fluid regardless of the pressure of fluid in said inlet port.

7. In a faucet for dispensing beverages or the like, a casing, a valve chamber within said casing, an inlet port leading into said chamber, a disk closing one end of said chamber, an orifice leading from said chamber through said disk, a valve for admitting iiuid through said inlet port into said chamber, and a disk disposed parallel to said first mentioned disk in closely spaced relation with respect thereto and mounted for movement towards and from said first mentioned disk to constrict or permit an increased amount of fluid to pass through said orifice dependent upon the pressure of fluid within said chamber, said movable disk being moved towards said stationary disk by the difference in pressure of iiuid passing between said disks and the pressure of fiuid on the outside of said movable diskas the velocity of fluid passing through said orifice increases, to maintain a relatively constant now of fluid regardless of the pressure of fluid within said chamber.

8. In a faucet for dispensing beverages or the like, a casing, a valve chamber within said casing, an inlet port leading into said chamber, a disk closing one end of said chamber, an orilice leading from said chamber through said disk, a Valve for admitting fluid through said inlet port into said chamber, another disk parallel to said first mentioned disk, mounted for movement towards and from said first mentioned disk to constrict or permit an increased amount of fluid to pass through said orifice, dependent upon the pressure of iiuid within said chamber, said movable disk being moved towards said stationary disk by r the difference in pressure of uid on the outside of said disk, as the velocity of fluid passing through said orifice increases, to maintain a relatively constant flow of iiuid regardless of the pressure of fluid within said chamber, and yieldable means for urging said movable disk in a direction away from said stationary disk.

NORMAN L. LUSTER.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Waite et al Sept. 16, 1947 

